I was looking at the Nvidia Games app in the playstore and the first picture under the app photos shows the app on a Google TV interface type homescreen.
This seems to be the next update for our sheilds. It looks slightly different from the chromecast version and it's not too far off from the UI we have now.
It also looks like it has some better integration with GeForce Now.
Take a look: https://m.imgur.com/bsmGtgR
THAT IS NOT THE GOOGLE TV INTERFACE.
That's the new ANDROID TV interface that was announced about TWO months ago and it's still rolling out very, very slowly.
Android TV homescreen gets another revamp, this time with some Google TV goodness.